/*
 * Copyright 2009 Original Author(s)
 * 
 * This file is part of Kommando
 * 
 * Kommando is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * Kommando is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with Kommando.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.kommando.shelf;

import java.util.ArrayList;
import java.util.List;

import org.kommando.core.catalog.Catalog;
import org.kommando.core.catalog.CatalogObject;
import org.kommando.core.util.Assert;

import ca.odell.glazedlists.BasicEventList;
import ca.odell.glazedlists.EventList;
import ca.odell.glazedlists.GlazedLists;

/**
 * @author Peter De Bruycker
 */
public class Shelf {

	private Catalog catalog;
	private EventList<ShelfEntry> entries = new BasicEventList<ShelfEntry>();

	public Shelf(Catalog catalog) {
		this.catalog = catalog;
	}

	public List<CatalogObject> getContents() {
		List<CatalogObject> objects = new ArrayList<CatalogObject>(entries
				.size());

		for (ShelfEntry entry : entries) {
			CatalogObject object = catalog.getObject(entry.getId());
			if (object != null) {
				objects.add(object);
			}
		}

		return objects;
	}

	public EventList<ShelfEntry> getEntries() {
		return GlazedLists.readOnlyList(entries);
	}

	public void add(CatalogObject object) {
		Assert.argumentNotNull("object", object);

		entries.add(new ShelfEntry(object));
	}

}
